Chuck.



F. J. CORNIL.

CHUCK.

APPLICATION FILED 0017.4, 1911.

Patented July 23, 1912.

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SEUCIL PPLIOATlON TILED 001.1. 1911.

1,033,547. Pate nted July 23, 1912.

2 SHEIJT8*SHEET 2.

FRANK J. CORNIL, OF ARGENTA, ARKANSAS.

CHUCK.

Specification of Letters Patent.

Patented July 23, 1912.

ication filed October 4, 1911. Serial No. 652,681

Z '0 all whom it may concern:

Be itkn'own that I, FRANK J. CoRNIL, a citizen oft-he United States, anda resident of Argenta, in the county of Pulaski and State of Arkansas,have invented a new and Improved'Chuck, of which the following is afull, clear, and exact description.

The object of the invention is to provide a new and improved chuck foruse on lathe,

drill'and boring machines and the like, and

arrange to hold the work firmly and securely place withoutvdanger of thework springing or becoming distorted while turning or boring; the work,and to allow of quickly and conveniently changing the jaws and themembers thereof for accommodating different kinds of work. a

For the purpose mentioned usc is made of main jaws mounted to slideradially in the usual manner on the face plate, each provided on itsfront face with an auxiliary jaw. and means for radially adjusting; anauxiliary jaw on its main jaw.

A practical embodiment of the invention is represented in theaccompanying drawings forming a part of this specification, in whichsimilar characters of reference indicate corresponding parts in all theviews.

Figure l is a perspective view of the chuck; Fig. 2 is an enlargedsectional side elevation of part of the same on the line 2-2 01 Fig. 3;Fig. 3 is a face view of the same; Fig. 4 is a plan view of the same;Fig. 5 is a sectional side elevation of the locking device for the gearwheel controlling the main jaws on the face plate; Fig. 6 is a sideelevation of part of the face plate and one of the main jaws and itsauxiliary jaw holding the work clamped between the said jaws; Fig. 7 isa face view of the same; Fig. 8 is a side elevation of part of the faceplate, one of the main jaws, its auxiliary jaw, and a clamping plate forholding the work between the main jaw and the clamping plate; and Fig. 9is a face view of the same and showingzthe work clampedbetween theauXiliary jaw and the clamping plate.

'lhe-rijdce plate A of the chuck is provided with the usual radial slotsB, in which are mounted to slide radially the main jaws C, each formedof an inner section C and an outer or face section C the nner section Gbeing provided with a nut C in which screws a screw rod D extendinradially and mounted to turn in suitable hearings on the face plate A.The outer end D of the screw rod D is made polygonal for the applicationof a wrench or other tool, to permit of turning the screw rod D, and 'onthe latter is secured a bevel gear wheel E in mesh with a gear wheel Fmounted to turn in the face plate A, so that when one of the screw rodsD of the chuck is turned, a rotary motion is transmitted by thecorresponding pinion E to the gear wheel 1 to rotate the remaining screwrods in unison, thus shifting the jaws G inward or outward according tothe direction in which a screw rod 1) is turned.

The Outer Section C of each jaw C=is reversibly held on the outer faceof the section C, and for this purpose use is made of screws G forfastening the sections "C and (3' together, the inner face of the outersec tion (I being also provided with lugs C engaging correspondingrecesses C 011 the mimt'ace of the section C, tosecurelyhold the sectionC in position on the section (1. One end of the outer sect-ion (l /isprovided with a clamping lug C.

The outer section C of each main jaw C is provided on its face with aprojecting half not H extending into a rccessl" formed in the back of anauxiliary jaw I, lndtqited to slide radially on the outer face ofthifsection 0*, and the said half nut H is in mesh with aradially-disposed screw rod J mountcd to turn in suitable bearingsarranged on the auxiliary jaw l. The ends J" of the screw rod J are madepolygonal for the application of a'wre n ch. to permit of turning thescrew rod J from the outer end whether the auxiliary jaw l is reversedwith the section C or not. The auxiliary jaw I is pro. vided with a lugI normally abutting with its under face against the top of the top ofthe lug C, and the faces of the lugs I and C" are preferably flush witheach other. A clamping plate K is adapted to fit against the faces ofthe lugs I and C, and a screw L engages the clamping plate K and screwsin-the joint of the lugs l and C, as plainly indicated in Fig. 2. Onturning, the screw L outward, the clamping plate K can be spaced fromthe lugs I and C to permit2ofclamping the work N between the clam )ingplate K and the lug. C (see Fig. 8), or 01 clam? ing the work N betweenthe clam ing plate K and the lug P, P

v distance apart toaccommodate the work N It will be noticed that whenthe auxiliary jaw I is moved outward on turning the screw J asdescribed, the lug I moves away from t e screw L so that the latter andthe ing plate clamping plate K can bereadily removed without screwingout the screw L from the lugs I and C. ing plate K is recess K adaptedto be engaged by offsets C and Pformed on the faces of the lugs I andC", so as to securely. hold the clamping plate K normally in position onthe faces of the lugs I and C. When the lugs I and C are used forclamping purposes as above described, it is only necessary to retard thescrew slightly to disengage the recess K from the ing the auxiliary jawI. outward, as above explained, so that the lugs I and C clear the innerface of the clamping plate K.

In order to permit of locking the screw rods Din a desired position, useis made of a locking device consisting essentially of locking plates 0and P, adapted to engage tlieouter and inner edges of the rim of thegear wheel F, as plainly indicated in Fig. 5. The locking plates 0 and.P areengaged by the right and left hand screw threads and Q of a screwrod Q, mounted to'turn in suitable bearings in the face plate A, theouter-end Q of t'heiscrew rod Q being made polygonal for the applicationof a wrench or other tool to allow turning of the screw rod Q with aview to move'the clamping plates O and P toward-each other and intoclamping contact with the rim of the gear wheel F, or from each otherout of clamping contact with the rim of the said gear wheel. Theclamping plate 0 is provided with a flange O inward or outward movement,the clam plate' P being likewise in engagement the face plate A forguiding the said clampin its inward .or outward movement'. The flange 0'also serves as aclamping block when the clamping plates 0 and Bareclosed or in closed posit-ion on the rim of the gear wheel F.

. By furnishing the faces of the lugs I, C with square offsets I, C thework can be abutted against the shoulders of the offsets I, C (see Fig.8), and then the work can be accurately positioned prior to finallyclamping it in place between the lugs P, C and the clamping plate K. Itwill also be noticed that by the arrangement described the The innerface of the clamppreferably provided with a offsets I and C, to allow ofmovfitting against the face plate" A so, as to guide the clamping plateQ in 'i'ts- P E- Wlth .the jaw C from the inner section .0, and

then the operator can reverse thesect-ion C with the parts carriedthereon left undisturbed, after which the section. C is replaced on thesection C and again. fastened thereto by the screws G. i

It is urther understood that the main jaws C and the parts carriedthereby can be readily adjusted in a radial direction on the face plateA, the auxiliary jawsgI can be independently adjusted on'th-e main aws C(see Figs. 6 and 'Z), and the clampingplate K can be independentlyadjusted relative to V the lugs I, C at the time the lug I is seated onthe lug C, as shown in Figs.2, 8 and 9.

- The chuck is especially serviceable for accurately turning or boringpacking rlngs; and the like.

Having thus described my invention, I claim as new and desire to secureby Letters Patent: I

1. A chuck, comprisinga face plate hay.- ing radial slots, main jawssl'idably mounted in the said slots and provided with clamping lugs, andauxiliary jaws mounted to slide radially on the front face of thesaidmain jaws and provided with clamping lugs normally abutting the clampinglugs of the said main jaws. I

2. A chuck, comprising a face plate haying radial slots, main jawsslidably mount-j, ed in the said 'slots and provided with 195 clampinglugs, auxiliary jaws-mounted to slide radially on the front' faces ofthe said main jaws and provided .with clamping lugs normally abuttingthe clamping lugs of the main jaws, and clamping plates held on thefront faces of the clamping lugs of said 1 vmain and auxiliary jaws.

3. A chuck, comprising a face plate having radial slots, main jawsslidably mounted in the said slots and each provided at one end with aclamping lug, auxiliary jaws mounted to slide radially onlthe frontfaces of the said main jzlvlvs g and protilclledl with clam in lugs norm'ng; e 0- amps ing liigs of the main jawsgc tun-ping plates 12( on thefront faces of the clamping ugs of said'main andauxiliary jaws, andbolts engaging the said clamping plates and screw ing in the jointsbetween the clampihg lugs of the main and auxiliary jaws. 4. A chuck,comprising a face plate having radial 'slots,'m'ain jaws slidablymountedin the said slots and each consisting of outer andinner'se'ctions, of which the outer sqctlon is reversibly mounted on theouter' face of the inner section, fastening means arranged to hold thesections together in either position, and auxiliary jaws mounted toslide on the outer se tions of the said main jaws.

5. A tfltltt'lt, (UtttPI'lSlllg a face plate lutvin radial slots, mainjaws slidahly mounted in the said slots and each consisting of outer andinner seetions, of which the outer seetion is reversibly mounted on theouter face of the inner section, and an auxiliar t' jaw mounted to slideradially on the, outer seetion ot a, main jaw, to allow ot' clamping thework between the outer section of the main jaw and the said auxiliaryjaw.

(3. A chuelt', comprising a face plate having radial slots, main jawsslidahly mounted in the said slots and each consisting of outer andinner sections, of which the outer section is reversibly mounted on theouter tace ot' the inner section. and is provided with an integralclamping lug, and an auxil iary jaw mounted to slide radially on thesaid with the clamping lttg' ot' the ut r se tion for clamping the worklltlWt'tll the auxiliary jaw attd the clamping lug.

7. A chuck, comprising a face plate haring radial slots, main jawsslidahly lttntlttt ed in the aid slots and each consisting of outer andinner sections. of which the uter section is reversihly mounted on theouter face (it the inner section and i provided with an integralclamping, hug, and an auxiliary jaw mounted to slide 'adially on thesaid outer section of a main jaw and provided with a clamping; lu thetat-es, ot' the said clamping lugs het'ng flush.

8. A ehuelt, comprising a face plate having radial slots, tuain jawsslidaiily mounted in the said slots and each eonsisting of outer andinner sections, of. which the outer section is reversibly mounted on theut r face ot the inner section and provided with an integral clamping hian auxiliary jaw mounted to slide radial y on the said outer section ofa main. jaw and provided with a clamping lug, the times ot the saidclamping lugs being tlush, a clamping plate fitting onto the said tlushfaces, and a screw engaging the said clamping plate and screwing in thejoint of the said lugs.

t). A chuck, comprising a face date having radial slots, main jawsslitlab y mounted in the said slots and each provided atone end with' aclamping lug, auxiliary jaws outer section of a main jan to (o-netmounted to slide radially on the front faces of the said main jaws, thesaid auxiliary jaws being, provided with clamping lugs normally engagingthe elampin; lugs of the main jaws, a halt' nut on each of the said mainjaws, and a t' tttltill vtttfij'mnt l screw mounted to turn on each ot'the said au\iliary jaws and engaging the corresponding nut, the srrewhating polft'j onal head: in each end to permit ot turning the :a'rr-etram either end.

10. A tl'tltt'h'. comprising a tare r-hitettat ittg: radial slot mainjawe vslidahly mounted in the said slots, and each onsi ting: of outerand inner sections, of whieh the outer Section is reversibly mount d onthe outer face of the. inner section and is provided with an integralclamping lug, an anxil' iary jaw mounted to slide initially on the saidouter section it a main jaw and mo vided with a clamping lug, the facesof the said clamping lugs la-ing tlnsh, a eiantnitng plate titting ontothe said ttush faces. and a screw engaging .he said (tam-ping nlate andtit-rearing in the joint, oi" the said ugs. the ahttt ing fares ot thesaid lugs and clamping plates heiug; ZtWi-lttl one with a recess and theother with at; e-tisrt ill 2,ttj in; the rec s it. A chuelt, comprisinga tae itat'eha't in; ra ial sluts, jaws it'teunted to slide in the saidslots, :2 Q'titl wheel mounted to turn and connected with the said jawto more the same sitnu taneously on the t'aee plate, and a loel in;device comprising lot-hing plates for engaging the outer and inner edgesot the rim t-t' said gear heel.

A rhuelt, eotngu" "1 1 a ta e date'navin; radial slots, jaws nounted toslide in the said slots, a gear wheel mounted to turn and connected withthe said jaws t more the same simul atteously m the face plate, ainching deviee to? the raid getir whe l. and comprising two incitingplates for engaging the outer and inner edges of the rini o't' the gearwheel, and a screw red mounted. to turn on the Fate plate and havingright and left, hand screw tln-"eads screwing: in the aid lockingplates,

In testimony I whereof t have s tn-d my name to this; specification inthe whence ot two suhscrihing witnesses,

FRANK Qt, ((lRNtL. Witnesses L. VANN,

WM. llonowrrz.

